Noctua's DO line of coolers has become a default choice when it comes to quietly cooling AMD Opteron CPUs. Upgrading both compatibility and performance, the new A3 model features Noctua's professional NM-A3 SecuFirm2™ mounting system that not only supports socket G34, C32 and F, but also allows to install the cooler turned by 90°. Thanks to six heatpipes, a performance optimised fin stack and its two premium grade NF-B9 92mm fans, the compact NH-U9DO A3 cools Opteron processors up to a thermal design power (TDP) of 115W at minimum noise levels. Bundled with Noctua's industrial-grade NT-H1 thermal compound and fitting standard 4U chassis, the NH-U9DO A3 forms a complete premium quality package for quietly cooling AMD workstations and servers.
Great product, patience is required when installin11/12/2012
The product itself is great, the fans are quiet and do a good job of cooling. Fastening the brackets to the base of heatsink requires patience. There is not much room to work with and it is difficult to get the short screws started. Other than that, everything installed with no problem. There was no option to connect to a 4-pin FAN connector, only 3 pins are supported.